Comparison of Drying Method and Alcohol Combustion Method for Water Content Test in Soil
This study focuses on a comparative study of two methods for the determination of soil moisture content,the drying method and the alcohol combustion method.The drying method is regarded as a standard method in the national standard for geotechnical tests,while the alcohol combustion method is a commonly used method for rapid field determination.Through several measurements of the water content of soil samples,we found that the results of the alcohol combustion method have the highest accuracy,good linear correlation with the results of the drying method,and the results are relatively stable and meet the specification requirements.Among the methods for rapid measurement of soil moisture content,the alcohol combustion method and microwave drying method have high accuracy,while the errors of the fry-drying method and the open-flame cauterization method are beyond the permissible range and increase with the increase of the mass fraction of clay.The main source of error was heating temperatures outside the recommended range of 105℃～110℃,which resulted in the decomposition of the samples at high temperatures,causing additional mass loss.Alcohol combustion and microwave drying methods can be used to rapidly measure soil moisture content in the field,whereas fry-drying and open-flame cauterization methods may not be suitable for field testing.The microwave drying method shows advantages in terms of speed,accuracy,ease of operation,energy savings and safety.If appropriate improvements can be made to domestic microwave ovens,the microwave drying method is expected to be more widely used in engineering and construction tests and has the potential to completely replace the drying method..
moisture contentelectric oven drying methodalcohol burning process
NETL
NSTL
万方数据
